Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a medium bowl, mix together the flour, baking soda, salt, and cinnamon; set aside.
In a large bowl, beat the softened butter, granulated sugar, and brown sugar together until creamy using an electric mixer or whisk.
Add the egg and vanilla extract to the butter mixture, mixing until well combined.
Gradually add the dry mixture into the wet mixture, stirring until just combined. Avoid overmixing.
Fold in the diced apple and caramel sauce until evenly distributed.
Using a cookie scoop or spoon, drop tablespoon-sized portions of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake in the preheated oven for 10-12 minutes or until the edges are lightly golden.
Once baked, remove from the oven and let the cookies cool on the baking sheet for 5 minutes before transferring to a cooling rack to cool completely.
For an extra touch, drizzle additional caramel sauce over the cooled cookies before serving.